Abubakar, Aminu Sahabi, Zied Hajej, and Aime C. Nyoungue. 2023. “Production System Optimisation With a Multi-Level Process Control Tool Integrated into Maintenance and Quality Strategies under Services and Quality Constraints”. European Journal of Science, Innovation and Technology 3 (3), 302-20. https://ejsit-journal.com/index.php/ejsit/article/view/221.